SharePoint and PDFs
Everyone knows that the Adobe PDF iFilter can be used to index PDF files, so I was quite surprised to look at an SP2010 farm last week that was only sometimes showing the PDF icon, and sometimes a blank icon.
Of course the solution to this was obvious, this farm had 2 WFE servers and the icon file and DOCICON.XML file had only been updated on one server, so a couple a minutes later everything was working once I had updated the 2nd server.
Here are the Microsoft instructions on how to install the PDF iFilter http://support.microsoft.com/kb/2293357
but personally I prefer the Nick Grattan instructions.